This is a list of abbreviations relating to climate change causation, adaptation and mitigation.
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- C&C - Contraction & Convergence, a global CO<sub>2</sub> emissions management model promoted by the Global Commons Institute
- CAIT - The World Resources Institute's Climate Data Explorer archive
- CAPP - Climate Action Pacific Partnership
- CAPP II - Climate Action Pacific Partnership (CAPP) Conference II â 2018
- CAPP III - Third meeting of the Climate Action Pacific Partnership Conference (29-30 April 2019)
- CCA - Climate Change Agreement (UK)
- CCAFS - Climate Change, Agriculture and Food Security Research Program
- CCAF - Climate Change Action Fund (Australia)
- CCC - Committee on Climate Change (UK)
- CCCEP - Centre for Climate Change Economics and Policy
- CCCR - Canada's Changing Climate Report
- CCCS - Centre for Climate Change Studies, University of Dar es Salaam
- CCF - The Scottish Government's Climate Challenge Fund
- CCIA - Climate Change in Australia
- CC:iNet - Climate Change Information Network
- CCL - Climate Change Levy (UK)
- CCl<sub>2</sub>F<sub>2</sub> - Dichlorodifluoromethane (greenhouse gas)
- CCLS - Cambridge Climate Lecture Series
- CCRA - Climate Change Risk Assessment
- CCS - Carbon Capture and Storage
- CCSO - Climate Change Support Office, within the United States' Department of State.
- CCUS - Carbon capture, utilization, and sequestration
- CDM - Clean Development Mechanism
- CDP - Organisation formerly known as the Carbon Disclosure Project
- CDR - Carbon dioxide removal
- CER - Certified Emission Reduction
- CFC - Chlorofluorocarbon
- CFRF - Climate Financial Risk Forum (UK)
- CF<sub>4</sub> - Carbon tetrafluoride or tetrafluoromethane (greenhouse gas)
- CGE - Consultative Group of Experts
- CHClF<sub>2</sub> - Chlorodifluoromethane (greenhouse gas)
- CH<sub>4</sub> - Methane
- CINC - Interdepartmental Committee of Climate Negotiators
- CLP - The Carbon Literacy Project (CLP)
- CMA - Meeting of the Parties to the Paris Agreement
- CMA1 - First meeting of the Parties to the Paris Agreement (7-18 November 2016)
- CMA1.2 - The second part of the first session of the Conference of the meeting of the Parties to the Paris Agreement (6-17 November 2017)
- CMA1.3 - The third part of the first session of the Conference of the meeting of the Parties to the Paris Agreement (2-14 December 2018)
- CMA2 - Second meeting of the Parties to the Paris Agreement (2âÂÂ13 December 2019)
- CMA3 - Third meeting of the Parties to the Paris Agreement (postponed to 1âÂÂ12 December 2021)
- CMIP - Coupled Model Intercomparison Project
- CMIP5 - Coupled Model Intercomparison Project, Phase 5
- CMP - Conference of the Parties Serving as the Meeting of Parties to the Kyoto Protocol
- CMP9 - 9th meeting of the Parties to the Kyoto Protocol (11-23 November 2013)
- CMP10 - 10th meeting of the Parties to the Kyoto Protocol (1-12 December 2014)
- CMP11 - 11th meeting of the Parties to the Kyoto Protocol (30 November-12 December 2015)
- CMP12 - 12th meeting of the Parties to the Kyoto Protocol (7-18 November 2016)
- CMP13 - 13th meeting of the Parties to the Kyoto Protocol (6-17 November 2017)
- CMP14 - 14th meeting of the Parties to the Kyoto Protocol (2-15 December 2018)
- CMP15 - 15th meeting of the Parties to the Kyoto Protocol (2âÂÂ13 December 2019)
- CMP16 - 16th meeting of the Parties to the Kyoto Protocol (postponed to 1âÂÂ12 December 2021)
- CNZ - Carbon Net Zero
- CO<sub>2</sub> - Carbon dioxide
- CO<sub>2</sub>-e - Carbon dioxide equivalent, also CO<sub>2</sub>-eq
- CoM - Covenant of Mayors for Climate and Energy (Europe)
- COP - Conference of the Parties [to the UNFCCC]
- COP1 - (28 March to 7 April 1995)
- COP2 - Second UNFCCC Conference of the Parties (8-18 July 1996)
- COP3 - Third UNFCCC Conference of the Parties (1-10 December 1997)
- COP4 - Fourth UNFCCC Conference of the Parties (2-14 November 1998)
- COP5 - Fifth UNFCCC Conference of the Parties (25 October to 5 November 1999)
- COP6 - (13âÂÂ25 November 2000)
- COP6-bis - Resumed Session of COP6 (16-27 July 2001)
- COP7 - Seventh UNFCCC Conference of the Parties (29 October - 10 November 2001)
- COP8 - Eighth UNFCCC Conference of the Parties (23 October - 1 November 2002)
- COP9 - Ninth UNFCCC Conference of the Parties (1-12 December 2003)
- COP10 - Tenth UNFCCC Conference of the Parties (6-14 December 2004)
- COP11 - Eleventh UNFCCC Conference of the Parties (28 November - 9 December 2005)
- COP12 - Twelfth UNFCCC Conference of the Parties (6-17 November 2006)
- COP13 - 13th UNFCCC Conference of the Parties (3-15 December 2007)
- COP14 - 14th UNFCCC Conference of the Parties (1-12 December 2008)
- COP15 - 15th UNFCCC Conference of the Parties (7-18 December 2009)
- COP16 - 16th UNFCCC Conference of the Parties (29 November - 10 December 2010)
- COP17 - 17th UNFCCC Conference of the Parties (28 November - 11 December 2011)
- COP18 - 18th UNFCCC Conference of the Parties (26 November - 6 December 2012)
- COP19 - 19th UNFCCC Conference of the Parties (11-23 November 2013)
- COP20 - 20th UNFCCC Conference of the Parties (1-12 December 2014)
- COP21 - 21st UNFCCC Conference of the Parties (30 November-12 December 2015)
- COP22 - 22nd UNFCCC Conference of the Parties (7-18 November 2016)
- COP23 - 23rd UNFCCC Conference of the Parties (6-17 November 2017)
- COP24 - 24th UNFCCC Conference of the Parties (2-15 December 2018)
- COP25 - 25th UNFCCC Conference of the Parties (2-13 December 2019)
- COP26 - 26th UNFCCC Conference of the Parties (1-12 November 2021)
- COP27 - 27th UNFCCC Conference of the Parties (6-18 November 2022)
- COP28 - 28th UNFCCC Conference of the Parties (30 November - 13 December 2023), held in the United Arab Emirates
- COP29 - 29th UNFCCC Conference of the Parties (11-22 November 2024), held in Baku
- COP30 - 2025 UNFCCC Conference of the Parties (10-21 November 2025), to take place in Belém, Brazil.
- COP31 - anticipated 2026 UNFCCC Conference of the Parties
- COP32 - anticipated 2027 UNFCCC Conference of the Parties, to be held in an African host city.
- COP33 - anticipated 2028 UNFCCC Conference of the Parties. Indian Prime Minister Narendra Modi has proposed hosting COP33 in India.
- CORSIA - Carbon Offsetting and Reduction Scheme for International Aviation
- CPA - Carbon Pricing Act (Singapore)
- CPRS - Carbon Pollution Reduction Scheme (Australia)
- CRC - CRC Energy Efficiency Scheme, formerly Carbon Reduction Commitment (UK)
- CREWS - Climate Risk and Early Warning Systems
- CRU - Climatic Research Unit at the University of East Anglia
- CRU TS - Climatic Research Unit Time Series datasets
- CSA - Climate-Smart Agriculture
- CVF - Climate Vulnerable Forum
- C40 - group of cities (now 96) focused on fighting the climate crisis: see C40 Cities Climate Leadership Group
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H
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J
K
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M
N
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P
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W
Numerical
Notes
References